I miss understand there is no error message , but the case happens in sales order if I enter minus quantity in delvier now filed, then post pinking slip the picking slip screen appear empty without any quantity as below

Check the quantity field on the sales line. Is this one filled with a positive or negative quantity? Another suggestion: what is the setting of the parameter picking requirements on you item model group?

OK - but for customer returns you should use a Return order. It's a complex process but it works. The only alternative to using a return order is to use a credit adjustment line on the sales order (that is a sales order line with a negative quantity).